A04.4 Other intestinal Escherichia coli infections

BillableNo payment HCCChapter 1

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Instructional notes

Chapter 1

Excludes2Not included here: the patient may have both; report both when both are present.

carrier or suspected carrier of infectious disease (Z22.-)
certain localized infections - see body system-related chapters
infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
infectious and parasitic diseases specific to the perinatal period (P35-P39)
influenza and other acute respiratory infections (J00-J22)

Use additional codeAdd a second code for the full picture.

code to identify resistance to antimicrobial drugs (Z16.-)

Includes

diseases generally recognized as communicable or transmissible

A04

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.

bacterial foodborne intoxications, NEC (A05.-)
tuberculous enteritis (A18.32)

This code

Inclusion terms

Escherichia coli enteritis NOS

Chapter 1: Certain infectious and parasitic diseases · A00-A09 Intestinal infectious diseases (A00-A09)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.